Eccentric-wear-resistant carbon fiber reinforced composite material continuous sucker rod and manufacturing device and method thereof

Abstract

The invention relates to an eccentric-wear-resistant carbon fiber reinforced composite material continuous sucker rod and a manufacturing device and method thereof.The continuous sucker rod is mainly composed of a carbon fiber reinforced layer along the axial direction of a rod body, a high-modulus glass fiber winding layer, and a wear-resistant high-modulus glass fiber reinforced layer along the axial direction of the rod body, the carbon fiber reinforced layer on the inner layer and along the axial direction of the rod body is formed by continuous acrylonitrile-based carbon fibers, the high-modulus glass fiber winding layer is a high-modulus glass fiber winding layer, the wear-resistant high-modulus glass fiber reinforced layer along the axial direction of the rod body is formed by wear-resistant high-modulus glass fibers, and a resin matrix is a multifunctional group epoxy resin system.The continuous sucker rod has the advantages that the winding layer is added, the inside of the continuous sucker rod is of a wavy structure, and three structural layers are solidified and formed in one time, so that contact area between carbon fibers and glass fibers is increased, interlayer bonding force is increased, layering among different reinforced materials when the rod body twists due to a concentric circle structure is avoided, radial and axial compressive strength is improved, and bending diameter is reduced.

Description

technical field [0001] The invention relates to a petroleum industry oil recovery equipment, a preparation method and a device, in particular to a continuous sucker rod made of eccentric wear-resistant carbon fiber reinforced composite material, and a preparation device and method thereof. Background technique [0002] Due to the increasingly complex types of developed reservoirs, the continuous increase of well depth and the continuous deterioration of the well and mine environment, the problems of corrosion and eccentric wear have become problems that need to be solved urgently in the oil production process of oilfields. Because of its light weight, high strength and corrosion resistance, composite sucker rods have gradually replaced traditional metal sucker rods. The composite material sucker rods currently used mainly include two categories: glass fiber reinforced plastic sucker rods and carbon fiber reinforced composite continuous sucker rods. FRP sucker rods are prepa...

AI Technical Summary

Problems solved by technology

Chinese patent CN1417449 discloses a method for preparing an anti-friction sucker rod. The method is to secondary injection mold an anti-friction block made of nylon and other materials on the formed sucker rod body to reduce the use of cladding materials and reduce the continuous wrapping. Covering the cost and complexity of the process, but the size of the injection-molded anti-wear block is relatively small, and it is relatively independently distributed on the rod body. Often, the anti-wear block is separated from the rod body, and the phenomenon of "candied haws" appears

However, the sucker rod adopts a one-time overall processing method of pultrusion and coating (including wire feeding-resin dipping-coating layer coating-preforming-curing-coiling process), and the coating layer is fiber fabric reinforced thermosetting resin. Not only increases the material cost, but also the partial wear resistance of the fiber fabric coating is not ideal

In addition, since the cross section of the carbon fiber reinforced composite continuous sucker rod is rectangular or elliptical, and its thickness is only 3 to 5mm, when using special equipment to go down well, it is almost impossible to choose the material of the clamping part, and can only use Two-piece clamping, the left and right directions cannot be limited, and it is easy for the rod body to deviate from the clamping part

Therefore, it is difficult to develop the structure and materials of the clamping part of its special downhole operation equipment, which has become a technical bottleneck in the application of continuous sucker rods made of carbon fiber reinforced composite materials, which limits the large-scale promotion and application of this product

Invention patent CN200910272324.X discloses a continuous sucker rod, which uses unidirectional reinforced fiber pultrusion and is coated with a thermoplastic wear-resistant layer. Its structure has problems such as poor radial compression performance, large winding diameter, and difficult operation.

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